Rotor and bucket.



G. W. DAKE.

ROTOR AND BUCKET.

APPLICATION FILED APR.15, 1912.

1,086,756; Patented Feb. 10, 1914.

v Figl 1 I r 2 I,

INVENTOR flaw/gs 11/912522 A TTORNEY 'nnrrnn snares PATENT ora ion CHARLES W. BAKE, OF CHICAGO, ILLENDIS. ASSIGNOR T0 PYLE-NATICNAL ELECTRIC HEADLIGHT COMPANY, OF CHICAGO, ILLINOIS, A CORFQRATION OF NEW JERSEY.

ROTOR AND BUCKET.

Specification of Letters Patent.

Application filed April 15, 1912.

Patented Feb. 110, i914. Serial no. 690,922.

To all 1:}; am it may com-cm Be it known that 1, CHARLES TW. Dana. a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Rotors and Buckets, of which the following is a specification.

My invention relates to improvements in turbines and particularly relates to improvements in rotors, and buckets therefor, and is illustrated diagrammatically in the ac companying drawings, wherein,-

Figure 1 is a radial section through the rotor showing the buckets in elevation; Fig. 2 is a side elevation of the bucket; Fig. 3 is a plan view showing a section along the line X of Fig. 1, showing some of the parts in elevation and some parts removed; Fig. 4c is a section through one of the buckets; Fig. 5 is a-bottom plan view of the bucket; Fig. 6 is an end elevation of the bucket; Fig. 7 is a detail elevation of the tiller.

Like parts are indicated by like letters throughout the several figures.

The rotor ring 20 is carried on the supporting arm or disk 6 mounted on the hub not shown, and has about its periphery the annular groove 7 having the inwardly inclined sides 21, so that the groove is wider at the bottom than. it is at the top. The rectangular slots 8, 8, located in the rotor ring 20 extend down through the inclined wall 21 and are in line at their outer side with the outermost edge of the groove 7, so that the distance between the outer walls of the opposed slots is the same as the distance between the walls or" the groove 7 at the bottom portion of the groove. The slots 8, 9 are located in two pairs, spaced one from the other at one point in the periphery. The filler segment 9 which is of the same width at the top as the annular groove T is provided on either side with the two downwardly extending flanges l0 and on either end with the two outwardly and downwardly extending in clined flanges 11, which flanges are of the same width as the slots 8 and have the same inclination as the wall 21, and are adapted to come in slidable contact with the wallsil,

.when the filler is dropped down through the slots 8 into the groove 7 and slid therealong.

The filler has the two opposed curved sides 22, 23, the side 22, which is "the side pointed toward the direction of rotation, being curved about a larger radius than the side 23, and each of said sides being concentric one with the other so that the radial distance between them i. any point is the same. The bucket 24 has the curved vertically disposed wall '2, the inner curvature of which is concentric with and of the same curvature as the outer wall of the tiller 9, and has on either side the inclined straight sides 25, which bring the wall down to a comparatively sharp edge on the sides in line with the outer edge of the rotor 20. The bucket has also the curved wall 4 whose inner surface is concentric with and of the same curvature as the side 23 of the filler 9, and this wall is provided on either side with the inclined rectilinear extensions 25 which project along the curved surface 26, concentric with and of the same radial curvature as the outer surface of the wall 2. These walls 2 and 3 together with the walls or extensions 25carry the closed top 26, which has the rcarnuirdly projecting fingers or ortions .1. The lower portion 0? the Wal 2 projects downwardly into the groove 7 and carries on either side the outwardly inclined flanges or lugs 3 of the same width as the openings 3, and have the same angle of in (-lination as the wall 21. The Wall i projects also down into the groove 7 and has similar inclined angular sided lugs 5 engaging the inclined walls 21.

ll will be Wident that while I have shown in my drawings an operative device, still many changes might. be made in the size, shape and arrangement of parts without departing materially from the spirit of my invention, and I wish therefore that my drawings be regarded as in a sense diagrammatic.

The use and operation of my invention are as follows: The rotor and buckets are first assembled by placing the tiller 9 between the walls of the bucket, thus closing the bottom opening between these walls, this filler being so designed as to tit snugly Within the bucket. The bucket is then placed on the rotor in such position that the lugs 3 and lugs 5 pass down through the slots 8, until the bucket rests firmly and snugly upon the outer or upper surface of the rotor. The bucket is then pushed along, the lugs on the bottoms of the walls engaging the inclined walls of the groove to hold the bucket in position. As the bucket-is pushed along, it carries with it the filler 9, which meanwhile is located above the wall of the rotor, but as the bucket moves, it reaches a point where the lugs 11 on the filler can drop through one of the slots or apertures 8 into the channet on the rotor. The filler is prevented from dropping too far by the lugs or arms l0, l1, and thus closes the bottom of the channel in the bucket. This process is continued until the whole periphery of the rotor is tilled by the thickets, which are packed closely together. it will be observed that when the buckets are packed closely toget her. the inclined sides of the walls 2 form continuations .of the walls 26, since the f grooved end 27 fit snugly against the grooved wall 2, and thus the passage is formed of substantially constant cross sectional area at all points, preventing the formation of eddy currents, local vacuums and the like, such as might materially interfere with the efliciency of the f buckets. The buckets thus form each a channel at the central part of the bucket, but each succeeding bucket helps to form the channel for the preceding bucket and helps to form a guide to direct the steam, or other motive fluid into the preceding bucket channel. The open spaces or pockets 30 between the buckets, do not do any harm whatever, because the steam is'never allowed to reach them, being kept away from them on one side by the walls 4 and E26 and on the other side by the walls 2.

I claim:

l; A turbine bucket comprising an in-. tcgral curved member U-shaped in cross sec tiou'having a closed top and an open bot tom a removable filler segment adapted to close said bottom to form a closed curved passage. V

A turbine bucket. having a pair of curved walls separateifrom but concentric with one anothe an integral top connecting said curved walls and a removable tiller ment interposed between said curred walls at their lower edge.

hln a turbine rotor a plurality of buckets each bucket having two concentric curved walls separated one from the other to form a pa'ssage'for. the motive fluid, the

walls having the smallest radius .of'curvature being provided at either end with a tangential extension. k J

4. In a turbine, rotor a plurality of buckets each bucket having two concentric curved walls separated one from the other menace to form a passage for the motive fluid, the walls having the smallest radius of coma ture being provided at either end with a tangential extension, said tangential extenthe inner surface of'said tangential exten-' sion.

6. A sheet metal bucket for turbines containing a passage of constantcross sectional area.

T. A rotor for fluid engines having ar ranged about its periphery a series of sheet metal buckets being closed aga nst the entrance of the motive fluid.

8. A rotor for fluid engines having ar ranged about its periphery a series of sheet metal buckets. said buckets having fluid pas sages of constant cross sectional'ar'ea. the spaces between said. buckets being closed against the entrance of the motive fluid.

buckets, the spaces between said 9. A. sheet metal bucket for fluid motors I made up of downwardly bent side walls. and integral top. and a removable closure located at the bottom of the side walls.

10. A sheet metal bucket for fluid motors made up of (lOWID 'ardly bent side walls and integral top, and a removable closure located at the bottom of the side \valls'to form a channel through the bucket of constant cross sectional area.

11. sheet metal bucket for fluid motors made; up of downwardly bent side walls and integraltop. and a closure located at the bottom of the side walls to form a channel through the bucket of constant cross sectional area.

Signed at Chicago, Illinois,'this 12th day ofApril 1912.

CHAR-LES w. DARE.

\Vitnesses Franc s W. PARKER, J1},

MINNIE I. Sonnron. 

